Pile grid
Pile gratings are deep foundations and consist of a number of piles or pile groups, the top of which is formed by a grate plate . The actual structure can then be erected on this. Pile gratings are divided into deep and high pile gratings. In the past, wooden stakes were used.
Piles
The piles are arranged as individual piles or as pile groups. They transfer the loads into the subsoil. To absorb horizontal forces, individual piles are often arranged at an angle in order to avoid bending stress on the vertical piles. In the case of pile groups, it is advantageous to drive the piles in at an angle to distribute the weight of the structure over the largest possible area.
Grate plate
The grate plate connects the piles or groups of piles. It can consist of a slab (e.g. reinforced concrete slab) or a combination of beam and plate ( T-beam ).
Deep and high post gratings
With deep pile gratings, the grate plate is on or under the site. The piles are completely in the ground. As a rule, there is no need to provide evidence of buckling resistance for these piles as they are supported by the ground.
In the case of high pile gratings, the piles protrude beyond the terrain, so the grate plate lies above the surface of the terrain. This applies e.g. B. also for pile foundations in water. As a rule, proof of buckling resistance must also be provided for the piles.